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package cl.ventas.control;

import cl.ventas.modelo.Usuario;
import cl.ventas.modelo.dao.UsuarioDao;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.LinkedList;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author RITTER
 */
public class InicioSesionServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet InicioSesionServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet InicioSesionServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        List errorMsgs = new LinkedList();
        try{
        String user = request.getParameter("txtUsuario");
        String clave = request.getParameter("txtClave");
        
        HttpSession sesion = request.getSession();
        
        
        
        if (user.trim().length()==0){
        errorMsgs.add("Ingrese su usuario");
        
        }
        if (clave.trim().length()==0){
        errorMsgs.add("Ingrese su clave");
        
        }
        Usuario u=new Usuario();
        u.setUsuario_user(user);
        u.setUsuario_clave(clave);
        u=u.verificarUsuario(user, clave);
        //En teoria esto retendria al usuario :c
        
        
        
        if (user.trim().length()>0&&clave.trim().length()>0){
        if(u!=null){
        
        if (u.getUsuario_privilegio()==0){
        sesion.setAttribute("usuario", u);
        response.sendRedirect("vistaCliente/listado.jsp");
        
        }
        else {
        sesion.setAttribute("usuario", u);
        response.sendRedirect("vistaAdm/listado.jsp");
        }
        }
        else {errorMsgs.add("El usuario o la clave están incorrectos");}
            
        }
        
        
        
         if ( ! errorMsgs.isEmpty() ) {
               
                request.setAttribute("errorMsgs", errorMsgs);
                
                RequestDispatcher view = request.getRequestDispatcher("/error.jsp");
               
                view.forward(request, response);
                return;
            }
    }
        
        
        catch (RuntimeException e){
        errorMsgs.add("Ha ocurrido un error inesperado");
        request.setAttribute("errorMsgs", errorMsgs);
        RequestDispatcher view = request.getRequestDispatcher("/error.jsp");
        view.forward(request, response);
                
        
}}

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
